Volume 61, Issue 31 e202204907
Communication

Total Synthesis of Complex Peptidyl Nucleoside Antibiotics: Asymmetric De Novo Syntheses of Miharamycin B and Its Biosynthetic Precursor

Dr. Wenjun Huang

Dr. Wenjun Huang

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Dr. Shuai Fan

Dr. Shuai Fan

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Dr. Jiahui Gao

Dr. Jiahui Gao

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Prof. Dr. Shangwen Luo

Prof. Dr. Shangwen Luo

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Prof. Dr. Shouchu Tang

Prof. Dr. Shouchu Tang

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Prof. Dr. Jian Liu

Corresponding Author

Prof. Dr. Jian Liu

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

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Prof. Dr. Xiaolei Wang

Corresponding Author

Prof. Dr. Xiaolei Wang

State Key Laboratory of Applied Organic Chemistry, Department of Chemistry and School of Pharmacy, Lanzhou University, Lanzhou, 730000 P. R. China

State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000 P. R. China

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First published: 23 May 2022
Citations: 7

Graphical Abstract

Simple building blocks were used for the total synthesis of miharamycin B and its biosynthetic precursor. The key step in the strategy was the de novo construction of the pyranose moiety through Achmatowicz rearrangement. The purine ring was introduced by palladium-catalyzed N-glycosylation.

Abstract

Miharamycins belong to a class of peptidyl nucleoside antibiotics with a unique nine-carbon pyranosyl amino acid core and a rare 2-aminopurine moiety. Herein, we report the de novo total synthesis of miharamycin B and its biosynthetic precursor from 3-bromofuran and Garner's aldehyde through a modified Achmatowicz reaction. Many challenges were resolved toward the de novo synthesis of miharamycin B, including the introduction of a dense array of functional groups, the stereoselective construction of consecutive stereocenters, dealing with the variability of the anomeric positions, and promoting site-selectivity in the cyclization to form the tetrahydrofuran ring. This de novo synthesis strategy enables efficient preparation of 3′-substituted saccharides, allowing the study of their structure–activity relationships and mode of action, and meets the growing demand for the development of novel antibiotics inspired by miharamycin natural products.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.